Spring for base rocking-chairs



(No Model.) 1

v A. B. STEVENS.

SPRING FOR BASE ROCKING CHAIRS.

N 369,133. b Patented Aug. 30,.1887..

WITNESSES: y

' 'ATTORNEY UNITED STATES PATENT OFFICE.

ASHER B. STEVENS, OF N EWV BRIDGE, NEW JERSEY, ASSIGN OR, BY MESNE ASSIGNMENTS, TO THE ROCKER SPRING COMPANY, OF CHICAGO, ILLINOIS.

SPRING FOR BASE ROCKING-CHAIRS.

SPECIFICATION forming part of Letters Patent No. 369,133, dated August 30, 1887.

' Application filed October a. 1883. Serial No. 108,413. (No model.)

To all whom it may concern.- I

Be it known that I, AsHER B. STEVENS, now of New Bridge, (formerly ofthe town ofRutherford,) county of Bergen, and State of New Jersey, have invented a new and useful Improvement in Springs for Base Rocking-Chairs; and I do, hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying sheet of drawings, forming part of this specification.

This invention is in the nature of an improvement in springs for base rocking-chairs; and the invention consists in the springs fora base rocking-chair, constructed and combined in the manner hereinafter shown, described,

1 and claimed.

In the accompanying sheet of drawings, Figure 1 is a side view of chair,partly in section; Fig. 2, a plan of springs and brackets; Fig. 3, a top view of same; Fig. 4:, a side view of same; Figs. 5 and 6, top and cross sections of modifications.

Similarletters of reference indicatelikeparts in the several figures.

The well-known base rocking-chairs have heretofore been supplied with coiled springs of various descriptions, and to improve the working of these springs, as well as to lessen the cost of their construction and application, I construct my spring A,which may be of any desired size, in the ordinary form of a closelycoiled spring, This spring is provided with an upper bracket, B, and a lower bracket, 0, of cast metal. tially, of a plate, a, and an arm, b, at rightangles to it. The outer ends of these arms are curved to a radius equal to the curvature of the coils of the spring A, and the edges of the curved ends, as at c, and also the heels of the arms, as at cl, are grooved or threaded to receive the wire'of one or more of the coils of the spring.

The upper bracket, B, is provided with a projection, e, and the lower bracket with a recess, f. Each bracket has formed in it ordinary holes for the admission of screws, by means of which the brackets are secured to the base and rockers of the chair. The brackets B and G are both united to the spring by so simply turning the curved ends and the grooved heels of the arms 6 until the upper Each bracket consists, essenand lower coils of the spring are respectively received into the grooves, c and d, formed therein. By this simple means the brackets and springs are fixed or screwed together firmly enough for all practical purposes. 7

When the brackets and spring are united in the manner hereinbefore described, the upper bracket, 13, is screwed fast to the inner side of the rocker of the chair, and the lower bracket, O, to the base, as is shown in Fig. 1. \Vhen in this position, it will be found that the projection c of the bracket B passes downward and below the curved or bearing edge of the rocker, and to some extent below the upper 6 edge of the base of the. chair; or, in' other words, this projection spans the restingplace of the rockers on the base, the recess f in the lower bracket, 0, permitting the projection to extend downward without interfering with the lower bracket in any way. By reason of this construction itis obvious that when the springs and brackets are secured, one on each inner side of the rockers and base, it will be impossible for the rockers to work sidewise from the base, the projections c acting as stops to prevent it.

The plate of the upper bracket, B, it will be noticed, has formed in it an opening, 9. This opening is important only when the bracket is being molded, for by reason thereof the bracket can have its screw-holes cast into it, and thereby save the cost and delay that would be caused by drilling them, for by means of this opening the plate a of the bracket can be molded horizontally in the sand, the sand for the arm b (which is vertical in the mold) being removed through the opening 9.

As a matter of convenience, when it is desired to attach or detach the chair from its base, and also for purposes of transportation, thearm b may be removably secured to the plate a by means of a boltand nut, as is shown in Fig. 5. These two parts of the bracket are readily detached and the chair at once separated from its base, and by means of the nut and screw they can as easily be attached. The construction of the lower bracket, 0, is practically the same as that of the upper bracket before described, with the exception of the absence of the projection e and the presence of the recess f.

ICO

I reserve for my divisional application, Serial No. 190,081, filed January 28, 1886, the features of the two-part bracket shown in Figs. 5 and 6, the same, however, being included in the broad claims herein made.

A vehicle-seat coiled spring heretofore has been provided with brackets to which the end coils are attached; but these brackets have been parallel to the plane of the diameter of the spring and arranged directly in alignment with the spring, that is directly under and over its ends. In my invention those portions of the brackets by which thespring is secured to the chair immediately are arranged at the sides of the spring rather than under or over its two endsthat is to say, the attaching portions of the brackets are at one side of the spring and substantially parallel to its longitudinal axis or center, so as to hold the spring firmly off from the attachingplates. Furthermore, in the vehicle seat spring before mentioned, the spring acts by compression of its coils, so that it is not adapted to draw and hold together two bodies, one moving upon the other.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-- x 1. A base rockingchair provided with coil springs secured to an upper bracket, B, having a plate, a, with projections 0, right angled arm b, with curved and grooved end and heel, and also a lower bracket having a plate, (1, arm I), and recess f, as and for the purpose described;

2. In a bracket for the spring of a base rocking chair, an opening, through the back oi said bracket, and the right-angled arm I), made with curved and grooved end and heel, as and for the purposes described.

3. An attachment for base rocking chairs, comprising a closely-coiled spiral spring and an attaching-bracket for each end thereof, each bracket having a plate to be secured to the rocker or base'rail at the side of the spring and an arm projecting substantially at right angles thereto crosswise of the spring, and extending between its coils to engage the end coils of the spring, whereby the spring may be rigidly secured to the. rocker and baserail of U the chair, substantially as described.

'4. An attachment for base rocking-chairs, comprising a closely-coiled spiral spring and an attaching-bracket for each end thereof, arranged at the side of the spring, each bracket consisting, essentially, of a plate to be secured to the rocker or base-rail and a threaded arm projecting substantially at right anglesthcrcto, and having its threaded portion inserted between the normally contiguous surfaces of the last two coils of the spring, whereby the said coils are maintained out of contact with each other and the drawing tension of the spring is increased when the spring is secured to the rocker and base-rail of the chair, substantially as described.

5'. An attachment for base rocking chairs, comprising a closely-coiled spiral spring and anattacliing-ln'acket for each end thereof, arranged at the side of the spring, each bracket consisting, essentially, of aplatc to be secured to the rocker or baserail and a grooved arm projecting substantially at right angles thereto, and having its grooved portion inserted between the normally eontiguous surfaces of the last two coils of the spring, whereby the said coils are maintained out of contact with each other and the drawing tension of the spring is increased when the spring is secured to the rocker and base-rail of the chair, substantially as described.

ASH ER B. S'IFEVEJS.

\Vitnesses:

H. Sonwlinrz, J r., W'M. L. Honr iiinn. 

